/
no-unnecessary-type-arguments.test.ts
127 lines (125 loc) · 3.13 KB
/
no-unnecessary-type-arguments.test.ts
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import path from 'path';
import rule from '../../src/rules/no-unnecessary-type-arguments';
import { RuleTester } from '../RuleTester';
const rootDir = path.join(process.cwd(), 'tests/fixtures');
const ruleTester = new RuleTester({
parserOptions: {
ecmaVersion: 2015,
tsconfigRootDir: rootDir,
project: './tsconfig.json',
},
parser: '@typescript-eslint/parser',
});
ruleTester.run('no-unnecessary-type-arguments', rule, {
valid: [
`function f<T = number>() { }
f();`,
`function f<T = number>() { }
f<string>();`,
`declare const f: any;
f();`,
`declare const f: any;
f<string>();`,
`declare const f: unknown;
f();`,
`declare const f: unknown;
f<string>();`,
`function g<T = number, U = string>() { }
g<number, number>();`,
`declare const g: any;
g<string, string>();`,
`declare const g: unknown;
g<string, string>();`,
`class C<T = number> { }
new C<string>();`,
`declare const C: any;
new C<string>();`,
`declare const C: unknown;
new C<string>();`,
`class C<T = number> { }
class D extends C<string> { }`,
`declare const C: any;
class D extends C<string> { }`,
`declare const C: unknown;
class D extends C<string> { }`,
`interface I<T = number> { }
class Impl implements I<string> { }`,
`class C<TC = number> { }
class D<TD = number> extends C { }`,
`declare const C: any;
class D<TD = number> extends C { }`,
`declare const C: unknown;
class D<TD = number> extends C { }`,
`let a: A<number>`,
],
invalid: [
{
code: `function f<T = number>() { }
f<number>();`,
errors: [
{
column: 11,
messageId: 'unnecessaryTypeParameter',
},
],
output: `function f<T = number>() { }
f();`,
},
{
code: `function g<T = number, U = string>() { }
g<string, string>();`,
errors: [
{
column: 19,
messageId: 'unnecessaryTypeParameter',
},
],
output: `function g<T = number, U = string>() { }
g<string>();`,
},
{
code: `class C<T = number> { }
function h(c: C<number>) { }`,
errors: [
{
messageId: 'unnecessaryTypeParameter',
},
],
output: `class C<T = number> { }
function h(c: C) { }`,
},
{
code: `class C<T = number> { }
new C<number>();`,
errors: [
{
messageId: 'unnecessaryTypeParameter',
},
],
output: `class C<T = number> { }
new C();`,
},
{
code: `class C<T = number> { }
class D extends C<number> { }`,
errors: [
{
messageId: 'unnecessaryTypeParameter',
},
],
output: `class C<T = number> { }
class D extends C { }`,
},
{
code: `interface I<T = number> { }
class Impl implements I<number> { }`,
errors: [
{
messageId: 'unnecessaryTypeParameter',
},
],
output: `interface I<T = number> { }
class Impl implements I { }`,
},
],
});